create Analytics dashboard group

Author: ethanpalm

docs.json

@@ -136,7 +136,13 @@
             "group": "Guides",
             "pages": [
               "guides/migration",
-              "guides/analytics",
+              {
+                "group": "Analytics dashboard",
+                "icon": "chart-line",
+                "pages": [
+                  "guides/analytics"
+                ]
+              },
               "react-components",
               "settings/custom-scripts",
               "settings/seo",